Review fixes

Author: pepyakin

src/ir/comp.rs

@@ -17,6 +17,7 @@ use peeking_take_while::PeekableExt;
 use std::cmp;
 use std::io;
 use std::mem;
+use std::collections::HashMap;
 
 /// The kind of compound type.
 #[derive(Debug, Copy, Clone, PartialEq)]
@@ -703,8 +704,6 @@ impl CompFields {
     }
 
     fn deanonymize_fields(&mut self, ctx: &BindgenContext, methods: &[Method]) {
-        use std::collections::HashMap;
-
         let fields = match *self {
             CompFields::AfterComputingBitfieldUnits(ref mut fields) => fields,
             CompFields::BeforeComputingBitfieldUnits(_) => {